US7206171B2 - Method for correcting a static posture of a head portion and a static posture correcting apparatus - Google Patents

Method for correcting a static posture of a head portion and a static posture correcting apparatus Download PDF

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US7206171B2
US7206171B2 US11/512,589 US51258906A US7206171B2 US 7206171 B2 US7206171 B2 US 7206171B2 US 51258906 A US51258906 A US 51258906A US 7206171 B2 US7206171 B2 US 7206171B2
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correction
flexure
recipe
static posture
correction recipe
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US20070047148A1 (en
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Osamu Okawara
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NHK Spring Co Ltd
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NHK Spring Co Ltd
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Assigned to NHK SPRING CO., LTD. reassignment NHK SPRING CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OKAWARA, OSAMU
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
    • G11B5/4833—Structure of the arm assembly, e.g. load beams, flexures, parts of the arm adapted for controlling vertical force on the head

Definitions

  • the present invention relates to method for correcting a static posture of a head portion and a static posture correcting apparatus for a head suspension and the like for a hard disk drive incorporated in an information processing apparatus such as computer.
  • the head portion constitutes a flexure to be attached to a head suspension, for supporting a slider to write and read data to and from a disk arranged in a hard disk drive.
  • a pitch angle and a roll angle of a head portion of a flexure of a head suspension without a slider or a head gimbal assembly with a slider are measured previously. Then irradiation lines are selected to correct the head portion so as to obtain a target pitch angle and a target roll angle thereof, and laser beams are irradiated on the selected irradiation lines in turn.
  • the head suspension and the head gimbal assembly are hereinafter referred to as “head suspension.”
  • the selection of the irradiation lines is, for example, made as follows. Namely, it measures the amount of change of data from a plurality of sample head suspensions which show where and how a flexure is irradiated and how much the angles change at a head portion. It is hereinafter referred to as “calibration.” Based on the results of this calibration, a correction recipe-table covering all the combinations of irradiation lines which shows where to irradiate laser beam to correct a head portion so as to obtain target angles thereof is prepared.
  • a combination of irradiation lines as a correction recipe is selected from the correction recipe-table so as to correct a pitch angle and a roll angle measured from a head portion of a flexure of an objective head suspension before correction into a target pitch angle and a target roll angle with the minimum number of laser irradiation.
  • the laser irradiation is done on each selected irradiation line of the flexure of the objective head suspension according to the selected correction recipe, so that the pitch angle and the roll angle of the head portion of the flexure of the objective head suspension are corrected.
  • An object of the present invention is to solve the problem to generate variation in a static posture angle of each product due to correction to deteriorate correction accuracy.
  • an aspect of the present invention is most characterized by preparing a correction recipe-table in view of variations among reference values of static posture angle changes of sample head suspensions in calibration, and selecting a correction recipe such that an expected variation in a static posture angle of a head portion of a flexure of an objective head suspension due to correction is diminished to obtain target static posture angle characteristic.
  • the method for correcting a static posture and a static posture correcting apparatus can prepare the correction recipe-table in view of variations among reference values of static posture angle changes of sample head suspensions in calibration.
  • a correction recipe is selected such that an expected variation in a static posture angle of a head portion of a flexure of an objective head suspension due to correction is diminished to obtain target static posture angle characteristic. Therefore, it can diminish the variation in the static posture angle after correction and can conduct correction of the static posture angle with high accuracy.
  • FIG. 1 is a schematic diagram showing a static posture correcting apparatus according to a first embodiment of the present invention
  • FIG. 2 is a schematic side view showing a laser irradiation unit of the static posture correcting apparatus of FIG. 1 ;
  • FIG. 3 is a plan view partly showing a flexure of a head suspension on which irradiation lines are expressed according to the first embodiment of the present invention
  • FIG. 4A is a list showing calibration results of a pitch fraction according to the first embodiment of the present invention.
  • FIG. 4B is a list showing calibration results of a roll fraction according to the first embodiment of the present invention.
  • FIG. 5A is an image showing a correction recipe-table graphed dependently on variation in a pitch angle and a roll angle of each sample head suspension in the calibration according to the first embodiment of the present invention
  • FIG. 5B is an image showing a correction recipe-table graphed dependently on a minimum number of laser irradiation according to a comparative example
  • FIG. 6 is a flowchart of the calibration according to the first embodiment of the present invention.
  • FIG. 7 is a flowchart of correction according to the first embodiment of the present invention.
  • FIG. 8A is a plan view partly showing a disk side face of a flexure of a head suspension on which irradiation lines are expressed according to a second embodiment of the present invention
  • FIG. 8B is a plan view partly showing a opposite disk side face of a flexure of a head suspension on which irradiation lines are expressed according to the second embodiment of the present invention
  • FIG. 9A is an image showing a correction recipe-table graphed dependently on variation in a pitch angle and a roll angle of each sample head suspension in calibration according to the second embodiment of the present invention.
  • FIG. 9B is an image showing a correction recipe-table graphed dependently on a minimum number of laser irradiation according to a comparative example.
  • Static posture correcting apparatuses and methods for correcting a static posture of a head portion will be explained in detail.
  • Each embodiment has a novelty in considering variations among reference values of static posture angle changes of sample head suspensions in calibration, to solve the problem to generate variation in a static posture angle of each product due to correction.
  • FIG. 1 is a schematic diagram showing a static posture correcting apparatus
  • FIG. 2 is a schematic side view showing a laser irradiation unit of the static posture correcting apparatus of FIG. 1 .
  • a static posture correcting apparatus 1 includes a carrier unit 5 for a head suspension 3 , a measuring unit 7 serving as a static posture angle measuring section, a laser irradiation unit 9 serving as a laser irradiation section and a controller 11 .
  • the measuring unit 7 and the laser irradiation unit 9 are arranged with respect to the carrier 5 .
  • the head suspension includes at least a base plate and a load beam supporting a flexure 17 .
  • the flexure 17 has a head portion 19 for supporting a slider that faces a disk to write and read data to and from the disk.
  • the “disk” is a storage medium which is arranged in a hard disk drive and to and from which data is written and read through the head suspension.
  • the carrier unit 5 has a carrier line 13 and a plurality of suspension set jigs 15 which support a head suspension 3 and travel on the carrier line 13 respectively.
  • the carrier unit 5 carries back and forth the suspension set jigs 15 each supporting a head suspension 3 .
  • the measuring unit 7 measures a pitch angle and a roll angle as a static posture angle of a head portion 19 of a flexure 17 of a head suspension 3 .
  • the measurement results as measurement value of the measured pitch angle and roll angle are input into the controller 11 from the measuring unit 7 .
  • the laser irradiation unit 9 irradiates laser beams on irradiation lines as after-mentioned required portions to be corrected of a flexure 17 of an objective head suspension, to correct a pitch angle and a roll angle of a head portion 19 of the flexure 17 .
  • an “objective flexure” is used as a flexure of an objective head suspension.
  • the controller 11 forms a correction recipe-table preparing section.
  • the controller 11 previously prepares a correction recipe-table and stores the prepared correction recipe-table into a storing part (not shown) thereof.
  • the correction recipe-table is prepared on the basis of reference value of a pitch angle change and a roll angle change of a head portion 19 of a flexure 17 obtained from a plurality of sample head suspensions.
  • the reference value is appeared by irradiating laser beams on a plurality of irradiation lines of the flexure 17 of each sample head suspension.
  • the correction recipe-table may be prepared in other portions, thereafter the results may be stored into the controller 11 .
  • the controller 11 forms a correction recipe selecting section that selects an effectual correction recipe from the correction recipe-table to correct a head portion 19 so as to obtain target pitch angle and roll angle characteristic of the head portion of a flexure of an objective head suspension based on the measurement value.
  • the effectual correction recipe instructs required portions of the objective flexure.
  • the controller 11 adopts a factor to diminish an expected variation in pitch angle and roll angle characteristic due to correction. The details are described later.
  • the controller 11 forms a control section that controls the laser irradiation unit 9 to irradiate laser beams on irradiation lines of an objective flexure 17 to be corrected according to a selected correction recipe.
  • a correction recipe selecting unit and a control unit may be comprised respectively by other units.
  • the laser irradiation unit 9 is configured so as to irradiate laser beams from above and from beneath on a head suspension 3 supported by the suspension set jig 15 .
  • the laser irradiation unit 9 may be configured to irradiate laser beams from any one of above or beneath.
  • the suspension set jig 15 supports a set pin 21 which adjusts the height of a head portion 19 of a head suspension 3 supported by the suspension set jig 15 to a prescribed height with respect to the laser irradiation unit 9 .
  • the suspension set jig 15 supports an objective head suspension 3 on the carrier line 13 and moves toward the measuring unit 7 under the control of the controller 11 .
  • the suspension set jig 15 is positioned.
  • the measuring unit 7 measures a pitch angle and a roll angle in a head portion 19 of an objective flexure 17 , and the measurement value of the measured pitch angle and roll angle is input to the controller 11 .
  • the controller 11 selects an effectual correction recipe of irradiation lines to be a minimum expected variation of the head portion 19 of the objective flexure 17 due to correction from the stored correction recipe-table.
  • the suspension set jig 15 on the carrier line 13 moves toward the laser irradiation unit 9 under the control of the controller 11 .
  • the objective head suspension 3 is positioned at the laser irradiation unit 9 .
  • the controller 11 controls the laser irradiation unit 9 to irradiate laser beams on irradiation lines on the objective flexure 17 according to the selected correction recipe, to correct the pitch angle and the roll angle of the head portion 19 .
  • the carrier line 13 is driven backward by the controller 11 .
  • the measuring unit 7 measures the pitch angle and the roll angle of the head portion 19 of the objective flexure 17 after the correction, and the head suspension 3 is taken out from the suspension set jig 15 .
  • a method for correcting a static posture of a head portion according to the first embodiment of the present invention will be explained in comparison with a method for correcting a static posture with a minimum number of laser irradiation.
  • FIG. 3 is a plan view partly showing a flexure 17 of a head suspension 3 on which irradiation lines are expressed.
  • the correction recipe-table is prepared for a single side face of a flexure 17 , and the correction recipe is selected for a single side face of an objective flexure 17 .
  • irradiation lines are respectively set to outriggers 23 and 25 symmetric on a single side face that is a disk side face of a flexure 17 .
  • the total number of irradiation lines is 20 . Namely, one outrigger 23 has 10 irradiation lines that are referred to as odd numerals F 1 to F 19 , and the other outrigger 25 has 10 irradiation lines that are referred to as even numerals F 2 to F 20 .
  • the irradiation lines may be set on besides the outrigger 23 and 25 , or the irradiation lines may be set on a single opposite disk side face of a flexure.
  • the “disk side face” is a surface to face to the disk, and the “opposite disk side face” is oriented opposite to the disk. In other words, the opposite disk side face is opposite to the disk side face.
  • the calibration results are, for example, as shown in FIG. 4 .
  • the calibration results are obtained from 6 sample head suspensions # 1 to # 6 .
  • FIG. 4A is a list showing the calibration results of a pitch fraction
  • FIG. 4B is a list showing the calibration results of a roll fraction.
  • FIGS. 4A and 4B show, for example, that an average of a pitch angle changes is 0.374 deg and an average of a roll angle changes is ⁇ 0.184 deg when irradiating a laser beam on the irradiation line F 1 of each sample head suspension.
  • the correction recipe-table covering all the combinations of irradiation lines to correct a head portion 19 of an objective flexure 17 is prepared.
  • Each combination instructs where and in what order to irradiate laser beams so as to obtain a target angle based on measurement value of a pitch angle and a roll angle before correction of a flexure 17 of an objective head suspension 3 to be corrected.
  • FIG. 5 is an image showing the correction recipe-table graphed dependently on variation in a pitch angle and a roll angle of each sample head suspension in the calibration according to the first embodiment of the present invention.
  • FIG. 5B is an image showing a correction recipe-table graphed dependently on a minimum number of laser irradiation in the calibration according to a comparative example.
  • an ordinate shows a pitch angle
  • an abscissa shows a roll angle.
  • a level of each expected variation is indicated with the tone of color made by layering different tones of color respectively assigned to variations of both a pitch angle and a roll angle.
  • expected variations are classified in three levels of high-density blocks, mid-density blocks and low-density blocks.
  • the low-density blocks each indicates an area of a minimum expected variation in a pitch angle and a roll angle due to correction.
  • the high-density blocks each indicates an area of a great expected variation in a pitch angle and a roll angle due to correction.
  • one recipe is selected to correct a head portion with the minimum number of laser irradiation according to the calibration results. For example, by irradiating on the combination of irradiation lines F 1 , F 5 , F 17 and F 13 , a pitch angle and a roll angle of a head portion 19 of a flexure 17 of an objective head suspension 3 to be corrected can be brought close to target values.
  • correction can be made with the minimum number of laser irradiation, but variations among reference values of pitch angles and roll angles of sample head suspensions in the calibration. Therefore, an expected variation due to correction is great, to deteriorate the correction accuracy.
  • ⁇ T ⁇ 1 2 + ⁇ 2 2 + ⁇ 3 2 + . . . .
  • the other correction recipes and expected variations can be also obtained, to indicate the other blocks with the tone of color as shown in FIG. 5B . Namely, all the blocks are toned in FIG. 5B .
  • white blocks that are not colored or toned of FIG. 5B shows that there is no correction recipe to correct the head portion to obtain a target value.
  • a correction recipe with minimum variation due to correction is selected on the basis of a pitch angle of 0.93 deg and a roll angle of ⁇ 0.13 deg before correction.
  • the selected correction recipe for example, is the combination of irradiation lines F 5 , F 6 , F 7 , F 8 and F 17 .
  • a head portion 19 corrected according to the correction recipe-table of FIG. 5B has great variation compared with a head portion 19 corrected according to the correction recipe-table of FIG. 5A .
  • the method for correcting a static posture of a head portion of the first embodiment of the present invention prepares the correction recipe-table of FIG. 5A in view of variations among sample head suspensions in the calibration.
  • An effectual correction recipe is selected from the correction recipe-table of FIG. 5A so as to diminish an expected variation due to correction.
  • a head portion 19 of an objective flexure 17 is corrected. Therefore, it can correct the head portion 19 of the objective flexure 17 with high accuracy and can diminish correction error greatly compared with the correction with a minimum number of laser irradiation on the basis of the correction recipe-table of FIG. 5B .
  • FIGS. 6 and 7 Control flow in the static posture correcting apparatus 1 on the basis of the method for correcting a static posture will be explained with reference to FIGS. 6 and 7 in which FIG. 6 is a flowchart of calibration and FIG. 7 is a flowchart of correction.
  • the method for correcting a static posture is applied to the control by the controller 11 of FIG. 1 .
  • step S 1 when the calibration process is started, a plurality of laser irradiation lines is determined in step S 1 .
  • laser irradiation lines F 1 to F 20 of FIG. 3 as objective portions on which laser beams are irradiated are decided on, and the calibration process proceeds to step S 2 .
  • step S 2 it obtains data of an amount of a pitch angle change and a roll angle change generated by irradiating laser beam on each decided laser irradiation lines of each sample head suspension.
  • the laser irradiation unit 9 of FIG. 1 irradiates laser beams on the decided irradiation line of each sample head suspension
  • the measuring unit 7 of FIG. 1 measures a pitch angle and a roll angle of each sample head suspension due to the laser irradiation and input the measured angles to the controller 11 of FIG. 1 .
  • the controller 11 measurement values as reference values of the input pitch angles and roll angles are read, and the each measurement value is operated to obtain the data of the amount of the pitch angle change and roll angle change. Thereafter, the calibration process proceeds to step S 3 .
  • step S 3 the operated amounts of the pitch angle changes and the roll angle changes in step S 2 are further operated to obtain average value and variation in a pitch angle and a roll angle of each laser irradiation line. This process is carried out in the controller 11 . Thereafter, the calibration process proceeds to step S 4 .
  • step S 4 the operated average values and variations in the pitch angle and the roll angle of each laser irradiation in step S 3 are further operated to obtain expected amounts of correction and variation with respect to all combinations of irradiation lines F 1 to F 20 , and the calibration process is terminated. This process is also carried out in the controller 11 .
  • the correction recipe-table in view of variations in a pitch angle and a roll angle as an image shown in FIG. 5A is prepared and is stored in the storing part of the controller 11 of FIG. 1 .
  • the controller 11 reads measurement values of a pitch angle and a roll angle of a head portion 19 of an objective flexure 17 before correction as an objective product in step S 11 .
  • the measuring unit 7 measures the pitch angle and the roll angle of the head portion 19 and input measurement values of the measured pitch angle and roll angle to the controller 11 .
  • the input measurement values are read. Thereafter, the correction process proceeds to step S 12 .
  • step S 12 the controller 11 determines whether the measurement values of the pitch angle and the roll angle of the head portion 19 are within a permissible range of set target values. Namely, the controller 11 compares the measurement values of the pitch angle and the roll angle with the set target values. If the measurement values are within the permissible range (Yes), the controller 11 decides the head portion 19 of the objective flexure 17 has no need to correct and sends the objective head suspension 3 to the next process. If the measurement values are not within the permissible range (NO), the correction process proceeds to step S 13 .
  • step S 13 the controller 11 selects a combination of irradiation lines expected to correct the head portion 19 with a minimum variation within the permissible range from the correction recipe-table of FIG. 5A as the calibration data.
  • the combination of appropriate irradiation lines for example, the F 5 , F 6 , F 7 , F 8 and F 17 are selected as an effectual correction recipe from the correction recipe-table. Thereafter, the correction process proceeds to step S 14 .
  • step S 14 laser beams are irradiated to correct the head portion 19 of the objective flexure 17 .
  • the objective head suspension 3 together with the suspension set jig 15 of FIG. 1 is moved to and positioned at the laser irradiation unit 9 with the control of the controller 11 .
  • the laser irradiation unit 9 is controlled to irradiate laser beams on the irradiation lines F 5 , F 6 , F 7 , F 8 and F 17 according to the selected correction recipe. Thereafter, the correction process proceeds to step S 15 .
  • step S 15 a pitch angle and a roll angle of the head portion 19 of the objective flexure 17 as a corrected product is measured.
  • the objective head suspension 3 together with the suspension set jig 15 is moved to the measuring unit 7 from the laser irradiation unit 9 after the correction, and is positioned at the measuring unit 7 .
  • the measuring unit 7 measures the pitch angle and the roll angle of the head portion 19 of the objective flexure 17 after the correction and inputs the measured values (measurement values) to the controller 11 .
  • the controller 11 reads the input measurement values, and the correction process proceeds to step S 16 .
  • step S 16 the controller 11 determines whether the measurement values of the pitch angle and the roll angle of the head portion 19 after the correction are within the permissible range of the set target values. This step is the same as step S 12 . Namely, the controller 11 compares the measurement values of the pitch angle and the roll angle with the set target values. If the measurement values are within the permissible range (Yes), the correction process proceeds to step S 17 . If the measurement values are not within the permissible range (No), the correction process proceeds to step S 118 .
  • step S 17 it proceeds to next processes. Namely, the corrected head suspension 3 is taken out form the suspension set jig 15 and transferred to the next process.
  • step S 18 the head suspension 3 is discarded. Namely, the uncorrected head suspension 3 is taken out form the suspension set jig 15 and transferred to a discard unit.
  • the method for correcting a static posture of a head portion and the static posture correcting apparatus 1 prepares the correction recipe-table in view of variations in a pitch angle and a roll angle of each sample head suspension due to laser irradiation on in the calibration.
  • a correction recipe is selected to correct a head portion 19 of an objective flexure 17 to obtain target pitch angle and roll angle characteristic so as to diminish an expected variation in a pitch angle and a roll angle due to the correction. Therefore, it can suppress the variation in the pitch angle and the roll angle due to the correction and can correct the head portion 19 with high accuracy.
  • the controller 11 prepares the correction recipe-table with respect to a single side face of a flexure 17 of a head suspension 3 , and selects the correction recipe with respect to only the single side face of a flexure 17 of an objective head suspension 3 to be corrected. Therefore, it can prevent the amount of data operation from increasing, and thereby, it is possible to process quickly and miniaturize apparatus.
  • FIG. 8A is a plan view partly showing a disk side face of a flexure of a head suspension on which irradiation lines are expressed
  • FIG. 8B is a plan view partly showing a opposite disk side face of the flexure on which irradiation lines are expressed.
  • control of a controller 11 of the second embodiment is different from the control of the controller 11 of the first embodiment. Namely, the controller 11 of the second embodiment prepares a correction recipe-table with respect to both side faces of a flexure 17 , and selects a correction recipe with respect to both side faces of a flexure 17 of an objective head suspension 3 .
  • the irradiation lines is the same as FIG. 3 serving as objective portions to be corrected are set in a disk side face of a flexure 17 of a head suspension 3 .
  • irradiation lines are also set on an opposite disk side face of the flexure 17 .
  • a load beam 27 is arranged, and thereby, spaces for setting irradiation lines becomes slightly smaller than FIG. 3 . Therefore, a total number of the irradiation lines on the opposite disk side face is 18 .
  • One outrigger 23 has 9 irradiation lines referred to as even numerals G 2 to G 18 and the other outrigger 25 has 9 irradiation lines referred to as odd numerals G 1 to G 17 on the opposite disk side face.
  • the irradiation lines on the opposite disk side face are set in the obversely and reversely same position with respect to corresponding irradiation lines on the disk side face. It may select irradiation lines not in the obversely and reversely same position.
  • FIG. 9A is an image showing a correction recipe-table graphed dependently on variations in a pitch angle and a roll angle of each sample head suspension in the calibration
  • FIG. 9B is an image showing a correction recipe-table graphed dependently on a minimum number of laser irradiation.
  • an ordinate shows a pitch angle
  • an abscissa shows a roll angle.
  • a number of low-density blocks increases, i.e., an area with minimum expected variation is expanded considerably in comparison with the correction recipe-table of FIG. 9B .
  • an area to be corrected accurately is expanded.
  • the disk side face is referred to as “Upper” and the opposite disk side face is referred to as “Lower.”
  • the correction recipe-table is prepared with respect to both side faces of a flexure 17 , and a correction recipe is selected with respect to the both side faces of a flexure 17 of an objective head suspension 3 .
  • the selected correction recipe is, for example, a combination of upper irradiation lines F 10 , F 13 , F 15 and a lower irradiation line G 15 .
  • the selected correction recipe is, for example, a combination of upper irradiation lines F 2 , F 4 , F 6 , F 11 , F 15 and a lower irradiation line G 2 .
  • the second embodiment of the present invention realizes substantially the same effect as those of the first embodiment.
  • the correction recipe-table is prepared with respect to both side faces of a flexure 17 , and a correction recipe is selected with respect to both side faces of a flexure 17 of an objective head suspension 3 , so that it can conduct correction of a head portion 19 of the objective flexure 17 with higher accuracy.

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
US20060215325A1 (en) * 2005-03-25 2006-09-28 Alps Electric Co., Ltd Method for correcting floating type magnetic head device
US20140233032A1 (en) * 2013-02-21 2014-08-21 Western Digital Technologies, Inc. Method and apparatus for measuring a pitch static attitude of a head stack assembly

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Publication number Priority date Publication date Assignee Title
JP4854684B2 (ja) * 2008-01-22 2012-01-18 日本発條株式会社 ヘッドサスペンションの修正方法及び製造方法、ヘッドサスペンション、並びに薄板の加工方法
JP6013708B2 (ja) 2011-05-11 2016-10-25 日本発條株式会社 姿勢修正装置
JP6006924B2 (ja) * 2011-10-05 2016-10-12 日本発條株式会社 姿勢角測定方法及び装置
CN102664024B (zh) * 2012-05-24 2014-12-17 深圳科瑞技术股份有限公司 一种调整激光器对准磁头浮动块的方法
CN108407601B (zh) * 2018-02-11 2019-11-08 清华大学 一种轮毂电机驱动的内置悬架及位置限制式传动电动轮

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JP2002074630A (ja) 2000-08-24 2002-03-15 Takeshiba Electric Co Ltd ディスク駆動装置用のサスペンションにおけるフレキシャーヘッド部等の姿勢角度修正システム

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JP2001357644A (ja) * 2000-06-13 2001-12-26 Tdk Corp 磁気ヘッド装置の姿勢角調整方法及び装置

Patent Citations (1)

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JP2002074630A (ja) 2000-08-24 2002-03-15 Takeshiba Electric Co Ltd ディスク駆動装置用のサスペンションにおけるフレキシャーヘッド部等の姿勢角度修正システム

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060215325A1 (en) * 2005-03-25 2006-09-28 Alps Electric Co., Ltd Method for correcting floating type magnetic head device
US7724477B2 (en) * 2005-03-25 2010-05-25 Tdk Corporation Method for correcting floating type magnetic head device
US20140233032A1 (en) * 2013-02-21 2014-08-21 Western Digital Technologies, Inc. Method and apparatus for measuring a pitch static attitude of a head stack assembly
US8964179B2 (en) * 2013-02-21 2015-02-24 Western Digital Technologies, Inc. Method and apparatus for measuring a pitch static attitude of a head stack assembly

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JP2007066427A (ja) 2007-03-15
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CN1925005B (zh) 2010-05-12
US20070047148A1 (en) 2007-03-01

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